B含量对马氏体耐热钢中BN相形态及性能的影响

doi:10.11901/1005.3093.2016.057

材料研究学报

2017, Vol. 31

Issue (5): 345-351 DOI: 10.11901/1005.3093.2016.057

论文

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B含量对马氏体耐热钢中BN相形态及性能的影响

马煜林, 刘越(

), 张莉萍, 周玲, 刘春明

东北大学材料科学与工程学院沈阳 110819

Effect of B Content on Morphology and Properties of BN Phase in Martensite Heat Resistant Steel

Yulin MA, Yue LIU(

), Liping ZHANG, Ling ZHOU, Chunming LIU

School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

引用本文:

马煜林, 刘越, 张莉萍, 周玲, 刘春明. B含量对马氏体耐热钢中BN相形态及性能的影响[J]. 材料研究学报, 2017, 31(5): 345-351.
Yulin MA, Yue LIU, Liping ZHANG, Ling ZHOU, Chunming LIU. Effect of B Content on Morphology and Properties of BN Phase in Martensite Heat Resistant Steel[J]. Chinese Journal of Materials Research, 2017, 31(5): 345-351.

全文: PDF(6619 KB) HTML

摘要:

为了研究不同B含量对马氏体耐热钢的微观组织和力学性能的影响,制备了B含量分别为0.012%、0.02%和0.03%的样件,讨论了不同B含量对基体中BN相形貌的影响机制。结果表明：随着B含量的增加,基体中BN相尺寸变大,0.03%B试样中BN相尺寸达到5 μm左右;0.012%B试样的抗拉和屈服强度最高;0.012%B试样断口韧窝中BN相为内部碎裂的块状,0.03%B试样中BN相出现薄片层叠堆积球状形态,是由于最初形成BN相的晶核以六方结构形式生长,达到临界尺寸后以B含量较高一侧局部优先生长方式生长,所以提高B含量增大了球形BN的极限尺寸。

关键词 ：金属材料, BN相, B含量, 马氏体耐热钢

Abstract：

In order to study the effect of different B element content on the microstructure and mechanical properties of martensitic steel microstructure prepared B element content was 0.012%, 0.02% and 0.03% of the ingredients, discussed the different elements in the matrix B influence mechanism BN phase morphology. The results showed that: with the increase of B content, size matrix BN phase is gradually increased, 0.03% B BN phase in the sample size to about 5 μm; 0.012% B sample tensile and yield strength of the highest value ; Fracture dimples 0.012% B sample in BN phase is the internal fragmentation of the massive, 0.03% B sample BN phase appears stacked sheets laminated spherical shape, because initially formed hexagonal BN phase nuclei in the form of structural growth , after reaching a critical size in the high B content side to locally grown under preferential growth is improved to increase the content of spherical BN B limits of size.

Key words： metallic materials BN precipitates B content martensite heat resistant steel

收稿日期: 2016-01-14

基金资助:国家自然科学基金重点项目(51334004)和辽宁省科技重大专项(201404001)

作者简介:

作者简介马煜林,男,1988年生,博士生

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表1 不同B含量试样的元素成分(质量分数,%)

图1 不同B含量的显微组织

图2 不同B含量的XRD分析图

图3 不同B含量中BN的形态对比,(a) 0.012%; (b) 0.02%; (c) 0.03%

图4 不同B含量的拉伸性能

图5 不同B含量试样的断口形貌

图6 0.012%B试样断口韧窝中第二相能谱图

图7 0.02%B和0.03%B试样断口韧窝中BN相形貌及能谱图

图8 不同B含量试样中BN相形貌

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